にひきかえ - Grammar Discussion

In stark contrast, In comparison, On the other hand, While, In sharp contrast

Structure
Noun+にひきかえ
[な]Adjective+な・であるにひきかえ
[い]Adjective+にひきかえ
Verb+にひきかえ
Phrase (A)。それにひきかえ、Noun は+Phrase (B)

(A) にひきかえ (B) is used to contrast two things/people/animals and so on subjectively. The speaker considers (A) and (B) to be complete opposites and evaluates one of them positively (usually A) and the other negatively (usually B).
The それにひきかえ pattern is the most common.
にひきかえ is used with factual clauses, so it is generally not used with expressions of conjecture like かもしれない and the like.

View on Bunpro

Is this phrase more commonly written in kana or as に引き換え? I get 2.6 million hits on に引き換え and only 500,000 for にひきかえ on Google, so I was surprised to see it here on Bunpro in kana only.