in other words vs to wit

in other words

adv

  • used to introduce an explanation, simplification, or clarification 

prep

  • Stated or interpreted another way; Used to introduce an explanation, simplification, or clarification. 

to wit

adv

  • that is to say; namely; specifically. 

How often have the words in other words and to wit occurred in a corpus of books? (source: Google Ngram Viewer )