Minyan

Ten men make a minyan or quorum for prayer in traditional Judaism.

So without my visit, if Simon didn't attend, a minyan would be hard to come by.

As mourners cannot attend synagogue during shiva, a minyan gathers for morning, afternoon, and evening services in their home.

New people assume leadership positions as required and stay around for as long as the minyan meets their needs.

Tefillin are not used on Sabbaths and holidays, so unless you attend a minyan on weekday mornings or grew up in a home where men prayed daily, this practice may be unfamiliar to you.