mar vs shipwreck

mar

verb
  • To spoil; to ruin; to scathe; to damage. 

noun
  • A small lake. 

  • A blemish. 

shipwreck

verb
  • To wreck a boat through a collision or mishap. 

noun
  • An event where a ship sinks or runs aground. 

  • A ship that has sunk or run aground so that it is no longer seaworthy. 

  • destruction; ruin; irretrievable loss 

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