skookum vs socko

skookum

adj
  • Excellent, impressive. 

  • Big, strong, durable, reliable, trustworthy, doughty. 

noun
  • An evil spirit or woodland monster or giant. 

  • A type of doll based on the mythical woodland monster. 

socko

adj
  • Superb, excellent, stunning. 

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