betweenager vs tweenie

betweenager

noun
  • Synonym of tweenager 

tweenie

noun
  • A child who is not quite old enough to be a teenager; a tweenager. 

  • A shot that is hit between the legs; a tweener. 

  • A 650-watt fresnel motion picture lighting instrument first manufactured by the Mole-Richardson Company. 

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