imply vs symbolize

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 

symbolize

verb
  • To be symbolic of; to represent. 

  • To use symbols; to represent ideas symbolically. 

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