Native speaker
In Emirati Arabic, “Once daily” is مرة باليوم (mara bil yohm).
مرة باليوم
Once daily
It's in the phrasebook under At the pharmacy, with 57 more like it.
qatra
maratayn bil yohm
rash
thalaath maraat bil yohm
nafkha
arba' maraat bil yohm
Source: DLIFLC Emirati Medical Language Survival Kit (2007). Credits and licences