ambivalent vs structureless

ambivalent

adj
  • Alternately having one opinion or feeling, and then the opposite. 

  • Simultaneously experiencing or expressing opposing or contradictory feelings, beliefs, or motivations. 

structureless

adj
  • Lacking structure. 

  • Lacking structures, edifices. 

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