imply vs make a difference

imply

verb
  • to have as a necessary consequence 

  • to suggest by logical inference 

  • to hint; to insinuate; to suggest tacitly and avoid a direct statement 

make a difference

verb
  • To be of importance; to matter. 

  • To carry out an action, the result of which is a significant change, or an altered circumstance. 

How often have the words imply and make a difference occurred in a corpus of books? (source: Google Ngram Viewer )