char vs detergent

char

noun
  • A charlady, a woman employed to do housework; cleaning lady. 

  • A charred substance. 

  • An odd job, a chore or piece of housework. 

  • A character (text element such as a letter or symbol). 

  • One of the several species of fishes of the genus Salvelinus. 

verb
  • To work, especially to do housework; to work by the day, without being a regularly hired servant. 

  • To burn something to charcoal. 

  • To burn slightly or superficially so as to affect colour. 

  • To work or hew (stone, etc.) 

detergent

noun
  • Any non-soap cleaning agent, especially a synthetic surfactant. 

adj
  • Synonym of cleansing. 

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