vacillating vs wobbly

vacillating

adj

  • Liable to vacillate. 

noun

  • Vacillation. 

wobbly

adj

  • Unsteady and tending to wobble. 

noun

  • A wobbler; a fit of rage; a tantrum. 

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