spiked vs tapering

spiked

adj
  • Containing alcohol or drugs, often without the informing those who partake. 

  • Having spikes. 

  • Of a graph or trend that has rapidly reached a maximum. 

tapering

noun
  • A tapered shape. 

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