astronaut vs berth

astronaut

noun
  • A member of the crew of a spaceship or other spacecraft that travels beyond Earth's atmosphere, or someone trained to serve that purpose. 

  • An American space traveler, when contrasted against equivalent terms from other countries such as cosmonaut, taikonaut, spationaut, and vyomanaut. 

  • A returnee who frequently flies back and forth between Hong Kong and their adopted home country. 

berth

noun
  • A job or position, especially on a ship. 

  • A room in which a number of the officers or ship's company mess and reside. 

  • position on the field of play 

  • Room for maneuvering or safety. (Often used in the phrase a wide berth.) 

  • Position or seed in a tournament bracket. 

  • A fixed bunk for sleeping (in caravans, trains, etc). 

  • A space for a ship to moor or a vehicle to park. 

verb
  • To use a device to bring a spaceship into its berth/dock 

  • to bring (a ship or vehicle) into its berth/berthing 

  • to assign a berth (bunk or position) to 

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