instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a woman sitting in front of a giant slice of cheese pizza'. Find frequency of the letter 'e'
answer:
4


question:
Sentence: 'a castle like bed room that has the era of templar knight similarities'. Find frequency of the letter 'm'
answer:
3


question:
Sentence: 'some people standing around a plane by  a hangar'. Find frequency of the letter 'd'
answer:

2