posticous vs sidelong

posticous

adj
  • posterior 

  • Situated on the outer side of a filament; said of an extrorse anther. 

sidelong

adj
  • Along the side of something. 

  • Slanting or sloping; oblique. 

  • Indirect; suggestive; not straightforward. 

  • Directed to the side; sideways. 

adv
  • obliquely 

  • Towards the side; sideways. 

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