windson,
although I am tempted to follow Shanes explanation :-), I have nonetheless quickly prepared a paper based on data coming from the AWS Welding Handbook "Welding Processes Part 1".
See also the attached pdf.
As for the: "...then it need 12 minutes and 35 seconds to cool down and can resume welding...", please note what js55 has posted. The entire cycle time for creating the data is always fixed at 10 minutes!
Best regards,
Stephan