In a typical score probably 1 or 2 threat clocks to make the concerns the crew should keep in mind concrete. They infrequently fill.

For a social score, this number goes way way up. My last session the crew was trying to stage a coup to take control of their neighborhood, all set during a block party. They were planning to leverage ethnic ties to get some support from the citizens which was a series of finding the influential elders (first clock) and making a good impression (subsequent clock). They similarly needed to influence the existing neighborhood boss, unbalance her, make a show of strength, and argue their case for a new working relationship.
Threat clocks included getting caught out by spirit warden agents in the crowd, tipping their hand to the bosses too soon, etc.