bad-mouthing vs execration

bad-mouthing

execration

noun
  • An act or instance of cursing; a curse dictated by violent feelings of hatred; an imprecation; an expression of utter detestation. 

  • That which is execrated; a detested thing. 

How often have the words bad-mouthing and execration occurred in a corpus of books? (source: Google Ngram Viewer )