crackbrained vs foolhardy

crackbrained

adj

  • Idiotic. 

foolhardy

adj

  • Marked by unthinking recklessness with disregard for danger; boldly rash; hotheaded. 

noun

  • A person who is foolhardy. 

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