Search Result for "on an irregular basis":
Wordnet 3.0

ADVERB (1)

1. in an irregular manner;
- Example: "her letters arrived irregularly"
[syn: irregularly, on an irregular basis]



WordNet (r) 3.0 (2006):

on an irregular basis
    adv 1: in an irregular manner; "her letters arrived irregularly"
           [syn: irregularly, on an irregular basis] [ant: on a
           regular basis, regularly]