exec vs first minister

exec

noun

  • executive, executive officer 

verb

  • To execute; to run. 

first minister

noun

  • The principal minister of a ruler or state. 

  • A leader of a devolved government such as Scotland, Wales, or Northern Ireland. 

  • The prime minister or a provincial or territorial premier. 

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