inoffensive vs obnoxious

inoffensive

adj
  • not offensive 

  • harmless 

obnoxious

adj
  • Exposed or vulnerable to something, especially harm or injury. 

  • Extremely offensive or unpleasant; very annoying, contemptible, or odious. 

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