You need to clarify these statements.
Frequency does not provide higher LF in all cases. You can have higher number of pax vs. competition with higher frequency, but that's about it.
Maxing out one route is not the best idea either (just my opinion). Yeah, you save on marketing costs, but that is only 1 variable supporting this strategy. There are others against it. Maxing out 1 route while RI is low will lead to low LFs (until the RI is high enough).
Furthermore, I meant maxing out his current routes, which there seems to be at least 3. I support opening a few routes at startup, but then serving those to max until opening new ones.
However, if you started with 3 daily flights in one route, wouldn't your RI rise much faster than if you flew 3 different routes once a day, thus leading to higher LFs faster in the route that's flown 3 times a day?
Also, if the route supports it, is there actually a difference in initial LFs if you fly 3 times one leg compared to flying 3 legs once a day? Eg, if you fly a 2000 demand route 3 times a day with 737, do you get, say, 3*100 pax, or less, when you would get 100 pax from each flight only flown once a day?