This is the 1688th most frequent Japanese word.
隻
A counter for ships, boats, or birds.
Here, '隻' is used as a counter specific to ships and boats.
私は日本に一隻の船を買った。
I bought one ship in Japan.
In this sentence, '隻' is used to express the number of ships ('数隻' means several ships).
漁師は毎日数隻の船で海に出る。
Fishermen go to sea daily with several ships.
'隻' is used here as part of the phrase '百隻以上' to indicate the number of ships in the fleet.