castoff vs ineffectual

castoff

adj
  • discarded, rejected. 

noun
  • Something that has been rejected or discarded; a reject. 

ineffectual

adj
  • Worthless; ineffective. 

  • Unable or insufficient to produce effect. 

  • Weak, indecisive; lacking forcefulness. 

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