idiotlike vs lackwit

idiotlike

adj

  • Characteristic of an idiot, resembling an idiot; foolish, idiotic, stupid. 

lackwit

adj

  • Foolish; idiotic or simple-minded. 

noun

  • A witless person; a fool. 

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