OCCASIONAL

adj. occurring now and then, irregular, infrequent, incidental, on occasion

Adjective
1. occurring from time to time; "took an occasional glass of wine"
(synonym) occasional(a)
(similar) infrequent
2. occurring or appearing at usually irregular intervals; "episodic in his affections"; "occasional headaches"
(synonym) episodic
(similar) unpredictable
3. employed in a specified capacity from time to time; "casual employment"; "a casual correspondence with a former teacher"; "an occasional worker"
(synonym) casual
(similar) irregular

(a.)
Produced by accident; as, the occasional origin of a thing.
  

(a.)
Of or pertaining to an occasion or to occasions; occuring at times, but not constant, regular, or systematic; made or happening as opportunity requires or admits; casual; incidental; as, occasional remarks, or efforts.
  

dao4 beng1 hai2 er2
Wrapping up a baby upside down.
A midwife who has wrapped up a new-born upside down is a picture of a old hand that occasionally make a mistake.

adj.
کبھي کبھي کا, اتفاقي, حسب موقع, عارضي, کداچت, سببي, خاص موقعے کا, خاص اوقات کا, خاص تقريب کا
occasional servants
مذکوري, عارضي نوکر