aerialist vs anchoress

aerialist

noun
  • A specialist in aerials, a freestyle skiing discipline. 

  • An acrobat performing high off the ground, defying a fall to earth, as on a trapeze or a tightrope. 

anchoress

noun
  • An anchorwoman. 

  • A female anchorite. A woman who chooses to withdraw from the world to live a solitary life of prayer and contemplation. 

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