That depends on the scan rate: when I used mine to measure battery state I ran the scan slowly enough the stretch the recovery signal across 30% or so of the scan, so the time for the scan to cross the screen was around 20 - 40 mS, and I fiddled with the scan trigger so that the voltage drop as the solenoid pulled in triggered a single shot scan,
I think most 'scopes can be set to this triggering mode and low scan speed, though its quite understandable that you'd not be familiar with this way of using a scope if you've never needed to observe such relatively slow events.
My scope's minimum scan speed is 200 mS/division, or 2 seconds to cross the whole screen, so I'd have been running it at 10-15 ms/division to do the battery condition check.
It helps to turn the brightness up enough that the whole scan is done before the image fades.
FWIW the triggering device was a timer used to 'dethermalise', i.e. bring down, a gliding model aircraft if it was still flying after a preset time, typically three minutes after a switch on the towhook was last operated as the model was launched from the top of its towline, so I set that to 6 seconds (its smallest interval) during battery testing. The battery being checked was a 4-5 cell NiCd used to drive the timer.
To see a trace, I simply flipped the towhook to start the timer and 6 seconds later the timer tripped and my scope drew a single trace across the screen, which was easily visible long enough to see the shape of the voltage drop and recovery and to measure the depth of the drop.