Ark vs Noah's ark

Ark

name
  • The boat built by the Biblical Noah to carry himself and the animals of the planet during the Flood. 

  • The chest carried by the Hebrews containing the stone tablets carved with the Ten Commandments. 

Noah's ark

name
  • The vessel built by Noah under God's instructions, as described in Genesis and the Quran. 

noun
  • A small bivalve mollusc, Arca noae. 

  • A shark. 

  • A toy consisting of a model boat and animals to put in it. 

How often have the words Ark and Noah's ark occurred in a corpus of books? (source: Google Ngram Viewer )