nebulous vs unformed

nebulous

adj
  • Vague or ill-defined. 

  • In the form of a cloud or haze; hazy. 

  • Relating to a nebula or nebulae. 

unformed

adj
  • Not having a definite form; shapeless; amorphous. 

  • Not well developed. 

  • Not formed or made. 

  • Not grouped into any constellation. 

  • Decomposed, or resolved into parts; having the form destroyed. 

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