std::multiset::count

From cppreference.com

size_type count( const Key& key ) const;

Returns the number of elements with key key.

Contents

[edit] Parameters

key - key value of the elements to count

[edit] Return value

Number of elements with key key

[edit] Complexity

Logarithmic in the size of the container plus linear in the number of the elements found.

[edit] See also

finds element with specific key
(public member function)
returns range of elements matching a specific key
(public member function)