backwards vs inverted

backwards

adj
  • Synonym of backward; see usage notes there. 

adv
  • Synonym of backward; see usage notes there. 

inverted

adj
  • Having the order or direction changed; for example turned upside down, reversed or in any other way opposite or contrary. 

  • (of a chord) Having the lowest note transposed an octave higher. 

  • (of sugar) Having its polarization changed by hydrolysis; see invert sugar. 

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