How many piano trios?

The term "piano triOS" typically refers to a musical ensemble consisting of a piano, a violin, and a cello. There are numerous piano triOS composed throughout the history of classical and contemporary music. Some well-known composers of piano triOS include Ludwig van Beethoven, Franz Schubert, Johannes Brahms, Dmitri Shostakovich, and many others.

If you're looking for an exact number, it's challenging to provide a specific count because composers continue to create piano triOS, and new compositions are added regularly. The number would depend on the time frame you're considering and whether you're including both historical and contemporary compositions.