pave vs tar

pave

verb
  • To cover something with paving slabs. 

  • To cover with stone, concrete, blacktop or other solid covering, especially to aid travel. 

  • To pave the way for; to make easy and smooth. 

tar

verb
  • To coat with tar. 

  • To besmirch. 

  • To create a tar archive. 

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