pococurante vs stonehearted

pococurante

adj

  • Apathetic, indifferent or nonchalant. 

noun

  • An apathetic, indifferent or nonchalant person. 

stonehearted

adj

  • Hardhearted; pitiless; unfeeling. 

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