hint vs talk to oneself

hint

verb
  • To bring to mind by a slight mention or remote allusion; to suggest in an indirect manner. 

  • To develop and add hints to a font. 

  • To imply without a direct statement; to provide a clue. 

noun
  • A small, barely detectable amount. 

  • An instruction to the database engine as to how a query should be executed, for example whether to use an index or not. 

  • An implicit suggestion that avoids a direct statement. 

  • A clue. 

  • Information in a computer-based font that suggests how the outlines of the font's glyphs should be distorted in order to produce, at specific sizes, a visually appealing pixel-based rendering; an instance of hinting. 

talk to oneself

verb
  • To say one's thoughts aloud, particularly while also not conversing with anyone else. 

How often have the words hint and talk to oneself occurred in a corpus of books? (source: Google Ngram Viewer )