brindle vs polychromate

brindle

adj
  • Having such a colouration; brindled 

noun
  • An animal so coloured. 

  • A streaky colouration in animals. 

verb
  • To form streaks of a different color. 

polychromate

adj
  • Composed of many colours 

noun
  • A salt or ion composed of multiple chromate groups 

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