Solved

How to see number of pit stops

How can I check to see in past race results how many pit stops were made by competitors? This will help me to determine my strategy.

To see previous results for the next race - go to 'Next Race' and then 'Circuit Data' then Race History' to see all results for that particular race track, you can then tap on each drivers race time to see their strategies.

You can also view race history for all of your previous races, just go to 'Team' then you will see history at the top. 

Michael.
Just be aware that old results are not stored indefinitely, so you can only go back a couple of seasons. It is a good idea to either keep notes or use the .CSV download function.