changeable vs polychromate

changeable

adj
  • Capable of camouflaging itself by changing colour. 

  • Capable of being changed. 

  • Subject to sudden or frequent changes. 

polychromate

adj
  • Composed of many colours 

noun
  • A salt or ion composed of multiple chromate groups 

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