helmsmanship vs wayfinding

helmsmanship

noun
  • The role of helmsman. 

wayfinding

noun
  • The ability of a person or animal to orientate oneself and to navigate; the process used by a person or animal for orienting oneself and navigating. 

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