That would be bad gouge. In a 31 day month, 16 days off is the norm. In a 30 day month, 15. Here is the sequence for Jan 02 for a friend of mine at MDW with 18 mos. seniority.
DATE Overnite City
Jan 3-5 MSY, MHT
9-12 JAX, SAN, RDU
16-18 RDU, LAS
23-25 BUR, TUS
1/30-2/01 ONT, FLL
The line pays 102 trips ($5660 @ second yr. rates plus about $650 in per diem) and has 85 hrs. of block.