irregularlyadverb
us/ɪˈreɡ·jə·lər·li/irregularly adverb (SHAPE)
in a way that is not regular, or that has parts of different shapes or sizes:
This irregularly shaped lake is 4 miles long.
irregularly adverb (TIME/SPACE)
not at regular times, or not having the usual or regular spaces in between:
He failed the exam because he only attended class irregularly.
irregularly adverb (RULE)
in a way that is not according to usual rules or what is expected:
A stationary object in the sky can appear to move irregularly.