not worth a brass farthing vs twopenny

not worth a brass farthing

adj

  • Worth nothing or next to nothing. 

twopenny

adj

  • Cheap; worthless; petty. 

  • Having a value or cost of twopence. 

How often have the words not worth a brass farthing and twopenny occurred in a corpus of books? (source: Google Ngram Viewer )