auto-suggestion vs insinuation

auto-suggestion

noun
  • An instance of suggesting a thought to oneself. 

  • The practice of suggesting thoughts to oneself. 

insinuation

noun
  • That which is insinuated; a hint; a suggestion, innuendo or intimation by distant allusion 

  • The act or process of insinuating; a creeping, winding, or flowing in. 

  • The act of gaining favor, affection, or influence, by gentle or artful means; — formerly used in a good sense, as of friendly influence or interposition. 

  • The art or power of gaining good will by a prepossessing manner. 

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