straightforward vs troublefree

straightforward

adv
  • In a straightforward manner; straightforwards; straightforwardly. 

adj
  • proceeding in a straight course or manner; not deviating 

  • easy, simple, uncomplicated, without difficulty 

  • direct; forthright; frank; sincere 

troublefree

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