Collocations for dwindle - verb

fast, quickly, rapidly
Supplies of coal are dwindling fast.

gradually, slowly
steadily
away, down (esp. AmE)
Membership of the club had dwindled away to nothing.

into
The group's support dwindled into insignificance.

to
Profits slowly dwindled to nothing.

Dwindle is used with these nouns as the subject:
number, population, reserve, stock, supply