perceptible vs tenuous

perceptible

adj

  • Able to be perceived, sensed, or discerned. 

noun

  • Anything that can be perceived. 

tenuous

adj

  • Insubstantial. 

  • Thin in substance or consistency. 

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