colour in vs scarlet

colour in

verb
  • To colourise; to add colours to a black-and-white drawing, using coloured drawing equipment. 

scarlet

verb
  • To dye or tinge (something) with scarlet. 

noun
  • A brilliant red colour tinged with orange. 

  • Cloth of a scarlet color. 

adj
  • Sinful or whorish. 

  • Blushing; embarrassed or mortified. 

  • Of a bright red colour. 

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