Finds available schedules that meet the specified criteria.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/ec2/describe-scheduled-instance-availability.html
| aws ec2 describe-scheduled-instance-availability --recurrence Frequency=Weekly |
| describe-scheduled-instances — AWS CLI 1.16.6 Command Reference : http://docs.aws.amazon.com/cli/latest/reference/ec2/describe-scheduled-instance-availability.html |