acrobat vs tightrope walker

acrobat

noun
  • An athlete who performs acts requiring skill, agility and coordination, often as part of a circus performance. 

verb
  • To move like an acrobat (with agility, balance, long leaps, etc.). 

  • To practise acrobatics. 

tightrope walker

noun
  • An acrobat who practices tightrope walking. 

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