instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'many different species of sheep in display at a museum'. Find frequency of the letter 'h'
answer:
1


question:
Sentence: 'a big bear walks through some grass'. Find frequency of the letter 'a'
answer:
4


question:
Sentence: 'the jar is full of cut vegetables and fluid'. Find frequency of the letter 'a'
answer:

3