何年か

several years

→ 何年
phrase Rare #23,877
several years Means an unspecified number of years, often translated as “a few years” or “some years.” With 前, it means “several years ago”; with したら, it means “after several years.”
JA: 何年か前に、この町に引っ越してきました。
EN: I moved to this town several years ago.

ええ何年かなぜここへ?

Yes—how many years? Why are you here?

— Carandiru (2003)

何年かしたらその考えが間違っていたって思うかもよ

In a few years, you might realize that you were wrong.

オーストラリア何年か働いてたんでしょ

You worked in Australia for a few years, right?

彼らはスペイン何年か住んだ

They lived in Spain for several years.

今年は何年か知っておる

Do you know what year it is this year?

— さらば、わが愛/覇王別姫 (1993)

ここ何年か彼らと話をしてない

I haven't spoken to them in several years.

— アメリカン・ギャングスター (2007)