Count frequency of key in linked list

Here given code implementation process.

1) Count frequency of a key in linked list in java 2) Count frequency of a key in linked list in c++ 3) Count frequency of a key in linked list in c 4) Count frequency of a key in linked list in golang 5) Count frequency of a key in linked list in c# 6) Count frequency of a key in linked list in php 7) Count frequency of a key in linked list in node js 8) Count frequency of a key in linked list in python 9) Count frequency of a key in linked list in ruby 10) Count frequency of a key in linked list in scala 11) Count frequency of a key in linked list in swift 12) Count frequency of a key in linked list in kotlin 13) Count frequency of a key in linked list in vb.net 14) Count frequency of a key in linked list in typescript