Being where I am I never lost any little yeast cooties to freeze
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With the beer it isn't so pleasant... I do not take offense to the straight sour mash recipe but I like those sort of scents
7 days is a good point to begin considering it usefully soured at mid 70's to 90's temps I did notice considerably slower souring when temps were lower for extended times...
At those warmer temps, I really noticed an improvement in potency at 14 days, I really never got to sour much longer than that as I had traps to keep baited...
I did the beer thing about the same it just didn't seem to improve results enuff to "de-flower" the scent of my real sour mash which, at 14 days, was obviously just a warm bath away from a bottle
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Disclaimer... I do not condone the violation of any BATFE regs including the distillation of spirits without payin' yer taxes... I only know how to make unaged corn liquor 'cuz I watch History Channel...
Brent