The USBC is the United States Bowling congress. Some benefits of joining the USBC include access to their online information on the official USBC site.
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You would need to contact USBC. I don't know if this statistic is published on USBC's Bowl.com website.
USBC membership is roughly 1.2 million in the 2015/16 bowling season.
Usbc, pba
First, you could contact the league secretary. If this was a USBC certified league, the USBC's website at bowl.com has an average lookup feature.
In the US, the lanes must be inspected and approved by the United States Bowling Congress (USBC). The USBC sets the standards for bowling in the US.
united states bowling council
It is probably about 160 for men and 140 for women.
The USBC has already done all the work for you. If you check out their site, they have formats for every combination. Just select the number of weeks that you need. See link below for more information.
Only games bowled under a sanctioned league may receive recognition by the sanctioning organization that the league sanctioned with. For example, if the league is based in the US and did not sanction in USBC then scores will not be recognized for any USBC awards, including the 300 ring. Even if bowlers who are members of a non-sanctioned league bowl a 300, they can not qualify for any USBC awards if the league did not sanction.
You can download the USBC schedule for a 10 team league from USBC's website at bowl.com or you can use league software that has the schedule built in, such as CDE Software's BLS bowling league secretary software.