to and fro, back and forth, up and down, here and there あちらこちらへ

by and large 全体として
= on the whole, all in all

again and again, over and over (again) 再三再四
= repeatedly

through and through 完全に
= completely

on and off, off and on 断続的に


sooner or later 遅かれ早かれ

more or less 多かれ少なかれ

これらのA or B「AであろうとBであろうと」で「譲歩」。

(every) now and then 時々

more and more+形容詞・副詞 ますます~

⇔ ■less and less+形容詞・副詞 ますます~でなくなって