The word carnival doesn't appear in any of the sheet titles, ballad titles, first lines or tunes in the Bodleian broadsides. (carnation-carol, the list goes). Nor in the UCSB broadside index.
There are 4 entries in the Roud index, three in the music source: Carnival of Venice and Carnival of Naples; the 4th is Queenie The Carnival Queen a 1934 song sung by Nellie Wallace.
So not in any title.
The word Fakenham also doesn't show in any index, except for two copies at the Bodleian of The Fakenham Ghost (one date 1805, one 1774-1825).