I didn't find any Bitbucket Cloud Yearly payment plan. Yearly Plan is showing for Server option.
Please tell me how we can opt for Qtrly, half yearly or Yearly plan for BitBucket Cloud.
Welcome to the Community!
If you look at the pricing page: https://bitbucket.org/product/pricing
and scroll down to the FAQ section you will see that annual plans for BitBucket Cloud are not something that is currently offered.
I believe that is because BitBucket Piplines (the build and deployment solution) is offered as a part of every BitBucket Cloud instance and there is no easy way to predict the build and deployment costs someone might consume during a flat annual fee.
I'd keep an eye out to see if Atlassian offers different pricing options in the future, but it looks like monthly is your only option for the moment.
I hope that helps!