https://aws.amazon.com/ec2/spot/instance-advisor/ https://aws.amazon.com/ec2/spot/instance-advisor/ It's not the exact metric but you can find which have more

https://aws.amazon.com/ec2/spot/instance-advisor/ https://aws.amazon.com/ec2/spot/instance-advisor/ It's not the exact metric but you can find which have more availability without knowing the exact number (which is constantly changing anyway)