A DROP IN THE OCEAN (OR N. AMER. BUCKET)
Meaning of A DROP IN THE OCEAN (OR N. AMER. BUCKET) in English
a drop in the ocean ( or N. Amer. bucket)
a very small amount compared with what is needed or expected.
→ drop
Concise Oxford English vocab.
Сжатый оксфордский словарь английского языка.
2004