peroxide vs yellowish

peroxide

verb
  • To treat (something) with hydrogen peroxide, especially hair in order to bleach it. 

noun
  • Hydrogen peroxide, especially when in an aqueous solution used as a bleach. 

  • A divalent radical or anion containing two oxygen atoms linked by a covalent bond; any substance containing this group which yields hydrogen peroxide when treated with an acid. 

  • Any compound containing the functional group R-O-O-R'. 

yellowish

adj
  • Somewhat yellow (in colour). 

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