colorize vs saturate

colorize

verb
  • To add color to. 

  • (Canadian spelling, acceptable) To convert black and white media to color by digital post production (as is often done in digital photography and in video special effects). 

saturate

verb
  • To render pure, or of a colour free from white light. 

  • To fill to excess. 

  • To cause to become completely impregnated, or soaked (especially with a liquid). 

  • To satisfy the affinity of; to cause a substance to become inert by chemical combination with all that it can hold. 

noun
  • Something saturated, especially a saturated fat. 

adj
  • Very intense. 

  • Saturated; wet. 

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