swab vs tar

swab

noun
  • A piece of material used for cleaning or sampling other items like musical instruments or guns. 

  • A sailor; a swabby. 

  • A naval officer's epaulet. 

  • A small piece of soft, absorbent material, such as gauze, used to clean wounds, apply medicine, or take samples of body fluids. Often attached to a stick or wire to aid access. 

  • A mop, especially on a ship. 

  • A sample taken with a swab (piece of absorbent material). 

verb
  • To use a swab on something, or clean something with a swab. 

tar

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

  • 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. 

  • Black tar, a form of heroin. 

  • Coal tar. 

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

verb
  • To besmirch. 

  • To create a tar archive. 

  • To coat with tar. 

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