1
general::
Also, either feast or famine. Either too much or too little, too many or too few. For example, Free-lancers generally find it's feast or famine? too many assignments or too few, or Yesterday two hundred showed up at the fair, today two dozen? it's either feast or famine. This expression, which transfers an overabundance or shortage of food to numerous other undertakings, was first recorded in 1732 as feast or fast, the noun famine being substituted in the early 1900s.
American Heritage Idioms
2
general::
Phrase(s): *(either) feast or famine
Fig. either too much (of something) or not enough (of something). (*Typically: be ~; have ~.) • This month is very dry, and last month it rained almost every day. Our weather is either feast or famine. • Sometimes we are busy, and sometimes we have nothing to do. It’s feast or famine.
McGrawhill's American Idioms And Phrasal Verbs