Quite a lot in my Impreza. A naturally aspirated engine means that I use quite a lot of WOT in it, as ther eis no turbo to give things a shove in the midrange.
Once or more per journey as I believe that a car should be worked.
2 guys who drive for us, identical Jag's (R's) one that is used properly (warmed up, booted frequently etc.) actually is more reliable than the one that is driven like miss Daisy is in the boot.
Have a 1.6tdi blue motion (aka slow motion) passat as a company car - saves money apparently - foot to the floor just to make it go anywhere... 105bhp in a 1700 kg car....!