inane vs needle in haystack

inane

noun

  • That which is void or empty. 

adj

  • Purposeless; pointless 

  • Lacking sense or meaning (often to the point of boredom or annoyance) 

  • Lacking sense or meaning (often to the point of boredom or annoyance) (lacking sense): 

needle in haystack

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