bicolour vs harlequin

bicolour

adj
  • Having two colours 

noun
  • A flower, cat etc., that has two colours. 

  • A flag with such colours, consisting of two stripes that are either vertical or horizontal. 

harlequin

adj
  • Of a greenish-chartreuse color. 

  • Brightly colored, especially in a pattern like that of a harlequin clown's clothes. 

verb
  • To make sport by playing ludicrous tricks. 

  • To remove or conjure away, as if by a harlequin's trick. 

noun
  • A greenish-chartreuse color. 

  • A pantomime fool, typically dressed in colorful checkered clothes. 

  • A harlequin duck. 

  • Any of various riodinid butterflies of the genera Taxila and Praetaxila. 

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