seaman vs tar

seaman

noun
  • An enlisted rate in the United States Navy and United States Coast Guard, ranking below petty officer third class and above seaman apprentice. 

  • A mariner or sailor, one who mans a ship. Opposed to landman or landsman. 

  • A person of the lowest rank in the Navy, below able seaman. 

  • A merman; the male of the mermaid. 

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