Well lots of businesses , have a high turnover rate , they plan for it , they actually have burnout schedule for approximately how long a employee will last , call centers have a notoriously. High turn over rate .
It’s like you throw a bunch of new employees into the job and just see which ones stick around for it .
Burnout schedules usually show up in many basic job startups , even the post office has a burnout rate figured into the equation of getting new hires . Even before people are quitting . Used to be in boiler room call centers you could practice you technique with other call center employees or at least get advise .. on what might work with calls.
“wing it till you get it “ 
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where ever you go ,there you are