[Vocabulary] Senior/Junior Younger/Older

[englishhobby]

Are these two pairs of words widely used when talking about siblings?

1) She is two years my junior/senior.
2) She is two years younger/older than me.

Are the two phrases equally common?

 

[emsr2d2]

Are these two pairs of words widely used when talking about siblings?

1) She is two years my junior.
2) She is two years younger than me.

Are the two phrases equally common?

Sentence 2 is much more common.