Pinhead vs officer

Pinhead

noun
  • A member of the Provisional IRA. 

officer

noun
  • A respectful term of address for an officer, especially a police officer. 

  • One who has a position of authority in a hierarchical organization, especially in military, police or government organizations. 

  • One who holds a public office. 

  • An agent or servant imparted with the ability, to some degree, to act on initiative. 

  • A commissioned officer. 

verb
  • To supply with officers. 

  • To command as or like an officer. 

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