The point was to plan to complete the services I listed for the time you were referring to. As you approach a slow time, you will ready your self "one week" to do the gutters. You will then be able to hit the lawn the following week. Then, you will hit the shrubs next week and then the lawn again the following. There is a month right there!
Don't be overly concerned with "weekly MOWINGS", concern yourself with taking care of the property and it's landscape. Get creative with your planning and scheduling to make your visits flow evenly and productively, while the taking care of the customer.
We are in a trasition zone down here. So as the Fescues slow in the summer, the warm season grasses begin to flourish, but there is still a slight slow period. We plan on emphasizing shrubs, gutters, straw and weeds during this time.
Luck has nothing to do with it.