Programmers have an unhealthy aversion to repetitive tasks. Sometimes you just have to do work-work. Happens all the time in other industries,
clock in at 9 do the same thing for 2 hours, take a break, do the same thing for 2 hours, lunch, 2 hours break, 2 hours, go home.
Repeat this for weeks if necessary, you can plan it out and predict when it will be done, if need be ask for more resources.