flatfoot vs shipmate

flatfoot

noun
  • A sailor. 

  • A condition in which the arch of the foot makes contact with the ground. 

  • A person having the above condition. 

verb
  • To wrong-foot. 

  • To perform an action inefficiently or awkwardly. 

  • To gulp an entire drink (bottle, glass, can, etc.) without pausing between swallows. 

  • To walk around in the course of work, especially when investigating. 

  • To dance in the style of Appalachian clogging. 

shipmate

noun
  • A fellow sailor serving on the same ship as another. 

  • Any sailor (when used as a form of address by a sailor). 

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