contaminate vs tar

contaminate

verb
  • To infect, often with bad objects 

  • To soil, stain, corrupt, or infect by contact or association. 

  • To make something dangerous or toxic by introducing impurities or foreign matter. 

  • To make unfit for use by the introduction of unwholesome or undesirable elements. 

tar

verb
  • To besmirch. 

  • To create a tar archive. 

  • To coat with tar. 

noun
  • A file produced by such a program. 

  • A black, oily, sticky, viscous substance, consisting mainly of hydrocarbons derived from organic materials such as wood, peat, or coal. 

  • A Persian long-necked, waisted string instrument, shared by many cultures and countries in the Middle East and the Caucasus. 

  • A solid residual byproduct of tobacco smoke. 

  • A single-headed round frame drum originating in North Africa and the Middle East. 

  • Black tar, a form of heroin. 

  • Coal tar. 

  • A program for archiving files, common on Unix systems. 

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