Jeg går til tandlægen to gange om året.

Not necessarily. In Danish, gå can mean both walk and more generally go, depending on context.

So in Jeg går til tandlægen, it usually means I go to the dentist, not specifically I walk to the dentist.

If you wanted to make it clear that you are walking on foot, the context would usually show that, or you could say something more specific.

The preposition til is needed with gå here because it shows movement to a place or person.

• gå til tandlægen = go to the dentist
• gå til lægen = go to the doctor
• gå til frisøren = go to the hairdresser

This is a very common pattern in Danish.

Danish often uses the definite form in expressions like this when talking about going to a professional for the usual service they provide.

So:

• gå til tandlægen
• gå til lægen
• gå til frisøren

Even though English often says go to the dentist too, the Danish definite ending may still feel surprising because Danish puts definiteness on the noun itself: tandlæge → tandlægen.

Here it does not mean one specific dentist in a strongly emphasized way. It is just the normal idiomatic expression.

Sometimes, but it is not exactly the same structure.

• gå til tandlægen = the standard expression for go to the dentist
• være hos tandlægen = be at the dentist's / be with the dentist

So if you are talking about the action of going there, til is the normal choice with gå.

Example:

• Jeg går til tandlægen i morgen. = I’m going to the dentist tomorrow.
• Jeg er hos tandlægen nu. = I’m at the dentist now.

Because gang becomes gange in the plural when it means time/occasion.

• én gang = one time / once
• to gange = two times
• tre gange = three times

So to gange is simply the correct plural form here.

Om året means per year or a year in a frequency sense.

So:

• to gange om året = twice a year
• literally: two times per year

This is a very common pattern:

• om dagen = per day
• om ugen = per week
• om måneden = per month
• om året = per year

Because om året is used for frequency: per year / each year.

• to gange om året = twice a year

By contrast, i året would usually mean in the year, referring to time inside a particular year, which is a different idea.

So for repeated frequency, use om:

• en gang om ugen
• tre gange om måneden
• to gange om året

Yes. Danish uses the present tense for habits and regular actions, just like English often does.

So Jeg går til tandlægen to gange om året means a habitual action:

• I go to the dentist twice a year

This is not necessarily happening right now. It describes what is generally true.

Because that part is an adverbial phrase telling you how often the action happens.

In Danish, frequency expressions often come later in the sentence, especially in a simple statement like this:

• Jeg går til tandlægen to gange om året.

That word order sounds very natural. Danish word order is fairly flexible in some cases, but this is the most straightforward and common arrangement.

A rough learner-friendly pronunciation is:

TAN-lay-en
or more carefully something like tan-lɛ-yen

A few things make this word tricky:

• d in the middle is often very soft
• æ is a vowel sound that does not match English exactly
• the ending -gen is not pronounced the way an English speaker might expect from the spelling

You do not pronounce every letter very clearly the way you might in English. Danish pronunciation is often much softer and more reduced than the spelling suggests.

Yes. To gange årligt also means twice a year.

The difference is mainly style:

• to gange om året = more everyday and conversational
• to gange årligt = a bit more formal or written

For normal speech, to gange om året is usually the most natural choice.

Yes. Because it is in the present tense and describes a habit, it can imply a general routine that is true now and expected to continue.

So it can mean something like:

• I go to the dentist twice a year
• I usually go to the dentist twice a year

It is a general statement about your routine, not just a single visit.