instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'party cakes in plastic containers, with a cake with a plastic santa claus and reindeer on top'. Find frequency of the letter 's'
answer:
6


question:
Sentence: 'a river with a long dragon boat in it and rowers on the boat in sets of two, along with two other people'. Find frequency of the letter 'h'
answer:
4


question:
Sentence: 'sailboats docked at a marina in fairly calm water'. Find frequency of the letter 'a'
answer:

9