centrifugal vs outward

centrifugal

adj
  • Tending, or causing, to recede from the center. 

  • Expanding first at the summit, and later at the base, as a flower cluster. 

  • Having the radicle turned toward the sides of the fruit, as some embryos. 

noun
  • A rotating machine used to separate massecuite into sugar crystals and molasses. 

outward

adj
  • outer; located towards the outside 

  • visible, noticeable 

  • Tending to the exterior or outside. 

adv
  • Towards the outside; away from the centre. 

noun
  • A ward in a detached building connected with a hospital. 

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