Yes Bi weekly till Lucknow. (12183/84)
Then 12193/94 introduced between Bpl-Pbh weekly with RSA with 12183/84.
Later 12183/84 got extended to PBH and 12193/94 merges in 12183/84 and became triweekly as it is today.
I've got the privilege to travel in 2nd regular run of 12193/94 from PBH to Bhopal. As Pratapgarh is my Maternal home.