let's see what gramma google has to say:

pishposh <> 1200
pish posh <> 6180
pish-posh <> 6860

pishtosh <> 59
pish tosh <> 1150
pish-tosh <> 765

some of these overlap, but it's clearly better than 7 to 1 (not quite an order of magnitude, but).