unsure vs vague

unsure

adj
  • unstable or precarious 

  • uncertain 

vague

adj
  • Not clearly expressed; stated in indefinite terms. 

  • Not clearly felt or sensed; somewhat subconscious. 

  • Not clearly defined, grasped, or understood; indistinct; slight. 

  • Lacking expression; vacant. 

  • Not having a precise meaning. 

  • Not thinking or expressing one’s thoughts clearly or precisely. 

  • Not sharply outlined; hazy. 

  • Wandering; vagrant; vagabond. 

verb
  • To make vague negative comments publicly; to make highly veiled complaints or insults. 

  • To become vague or act in a vague manner. 

noun
  • An indefinite expanse. 

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