open-ended vs transformable

open-ended

adj
  • Adaptable to change. 

  • Of a straight draw, made up of four consecutive cards, thus able to be completed by either of two ranks of card. 

  • Permitting a spontaneous or unstructured response. 

  • Unrestricted by definite limits. 

  • There will be an open-ended discussion. 

transformable

adj
  • Able to be transformed. 

How often have the words open-ended and transformable occurred in a corpus of books? (source: Google Ngram Viewer )