fantasise vs whimsy

fantasise

verb
  • To indulge in fantasy; to imagine things only possible in fantasy. 

  • To portray in the mind, using fantasy. 

whimsy

verb
  • To fill with whimsies or whims; to make fantastic; to craze. 

noun
  • An impulsive, illogical or capricious character. 

  • A quaint and fanciful idea; a whim; playfully odd behaviour. 

  • A jigsaw puzzle piece that has been cut into a recognizable shape, as if on a whim; often the shape is representative of the theme of the image used for the puzzle. 

  • A whim (capstan or vertical drum). 

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