abstractive vs abstruse

abstractive

adj
  • Having an abstracting nature or tendency; tending to separate; tending to be withdrawn. 

  • Derived by abstraction; belonging to abstraction. 

abstruse

adj
  • Difficult to comprehend or understand; obscure. 

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