sporadic

/spษ”หˆษนรฆษพษชk/

IPA: /S P ER0 AE1 D IH0 K/

adjective
  1. 1

    (of diseases) occurring in isolated instances; not epidemic.

  2. 2

    Rare and scattered in occurrence.

  3. 3

    Exhibiting random behavior; patternless.

Source: https://en.wiktionary.org/wiki/sporadic