Question on inhaling (cannabis)

I'm aware that you have to keep in for a short time for maximum THC effect, like 5 seconds. But if I had a mixed strain and I wanted to get the more indica effects out of it, would be keeping in a long time give me the maximum CBD? Because if I inhale for a short time a get a more stimulating/psychedelic effect, while if I keep it in for like 10 seconds I get more stoning (CBD) effects