intimation vs self-suggestion

intimation

noun
  • The act of intimating. 

  • The thing intimated. 

  • Announcement; declaration. 

  • A hint; an obscure or indirect suggestion or notice; a remote or ambiguous reference. 

self-suggestion

noun
  • Synonym of autosuggestion 

How often have the words intimation and self-suggestion occurred in a corpus of books? (source: Google Ngram Viewer )