detergent vs oil

detergent

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

adj
  • Synonym of cleansing. 

oil

noun
  • Oil paint. 

  • petroleum 

  • petroleum-based liquid used as fuel or lubricant. 

  • Liquid fat. 

  • An oil painting. 

  • Containing oil, conveying oil; intended for or capable of containing oil. 

verb
  • To lubricate with oil. 

  • To grease with oil for cooking. 

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