Karnatakabhashabhushana 7.12

[The suffix] me [occurs] optionally in the sense of frequency.

The suffix me occurs optionally after numeral expressions in the sense of frequency.

orme [‘once’],

irme [‘twice’],

mūme [‘thrice’],

nālme [‘four times’],

nūrme [‘a hundred times’],

sāsirme [‘a thousand times’].

In the alternative—

ondusūḻ [‘once’],

eraḍusūḻ [‘twice’],

mūṟusūḻ [‘thrice’],

and so forth.