polish vs tar

polish

noun
  • A substance used to polish. 

  • Refinement; cleanliness in performance or presentation. 

  • Cleanliness; smoothness, shininess. 

verb
  • To refine; to wear off the rudeness, coarseness, or rusticity of; to make elegant and polite. 

  • To apply shoe polish to shoes. 

  • To become smooth, as from friction; to receive a gloss; to take a smooth and glossy surface. 

  • To shine; to make a surface very smooth or shiny by rubbing, cleaning, or grinding. 

  • To refine; remove imperfections from. 

tar

noun
  • Black tar, a form of heroin. 

  • 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. 

  • 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 polish and tar occurred in a corpus of books? (source: Google Ngram Viewer )