This is the 221st most frequent Polish word.
mniej
"Less."
Here, 'mniej' is used as a comparative adverb meaning 'less' to indicate a smaller amount of work compared to another time.
Mam mniej pracy niż wczoraj.
I have less work than yesterday.
In this sentence, 'mniej' acts as a quantifier meaning 'fewer' in combination with a countable noun.
Mniej ludzi przyszło na spotkanie niż oczekiwaliśmy.
Fewer people came to the meeting than we expected.
Here, 'mniej' is used in an ordinal comparison, representing 'is less than' in numbers.