dropoff

/D R AA1 P AO0 F/
noun
  1. 1

    A sudden downward slope.

  2. 2

    A sudden decrease.

    โ€œThere has been an unexplained drop-off in sales this quarter.โ€

  3. 3

    A space reserved outside a bus or railway station for vehicles stopping to drop off passengers for onward transit.

Source: https://en.wiktionary.org/wiki/drop-off, https://en.wiktionary.org/wiki/dropoff