The grammar of ~かれ~かれ?

Question

Consider these: > - 遅かれ早かれ > - 良【よ】かれ悪【あ】しかれ What is the underlying grammatical make up of this `~かれ~かれ` pattern (if any)? Is this pattern productive(i.e. can be extended to arbitrary words)?

Answer 1

The pattern seems to link two opposite adjectives. The pairs for better or for worse, sooner or later, more or less seem to be the most common, if only ones used.