academical vs knowledgeful

academical

noun
  • Academic dress, consisting of a cap and gown. 

adj
  • Belonging to the school of Plato; believing in Plato's philosophy; sceptical . 

  • Pertaining to a university or other form of higher education. 

knowledgeful

adj
  • Full of knowledge; knowledgeable. 

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