betoken vs imply

betoken

verb
  • To foreshow by present signs; indicate something future by that which is seen or known. 

  • To signify by some visible object; show by signs or tokens. 

imply

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

  • to suggest by logical inference 

  • to have as a necessary consequence 

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