Detailed Instructions: In this task, you need to count the number of times the given letter appears in the given sentence.
Q: Sentence: 'a blue bus and a red bus in a parking lot'. Find frequency of the letter 't'
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
1