1.
I go to the gas station such a small amount of trips that I forget how to put gas in the gas tank.
2.
I go to the gas station such a small amount of time that I forget how to put gas in the gas tank.
3.
Change such a small amount to so little.
I go to the gas station so little that I forget how to put gas in the gas tank.
4.
Change such a small amount to so rarely.
I go to the gas station so rarely that I forget how to put gas in the gas tank.
make a trip (n.) – course of travel to do a task. He made several trips to the refrigerator to get snacks.
time (noncount noun) – the thing that is measured in minutes, hours, days, years etc using clocks Einstein studied relativity in space and time.
times (count noun) – a limited period or interval, as between two successive events We went there several times.