unable vs weaponless

unable

adj

  • Not able; lacking a certain ability. 

intj

  • Indicating that a requested course of action is not possible to carry out. 

verb

  • To render unable; to disable. 

weaponless

adj

  • Lacking a weapon. 

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