rotational vs vorticular

rotational

adj
  • Of, pertaining to or caused by rotation. 

noun
  • An employee in a job rotation scheme. 

  • Something, such as a joint, that moves by rotating. 

vorticular

adj
  • Synonym of vortical 

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