Reference for Yoma 50:3

איכא דאמרי דוקא מחתה וקטרת דחדא עבודה היא אבל שאר עבודות בעי פייס

therefore a special count should be arranged for it, hence we are taught [that it is not so]. Come and hear: R'Hiyya taught: There was no count for each individual task, the priest who secured the task of [the killing of] the daily burnt-offering drew twelve priests to himself [for the tasks involved].

Jastrow