Is there a radio frequency that is sure to be quiet? When flying in beautiful VFR weather, I often search for a quiet frequency so I don't listen to a lot of chatter.

Guard (121.5) sometimes works, but sometimes has "Guard"-ians on it.
("Yer on gaaard")

Many frequencies end up being a distant CTAF that have garbled transmissions.

Short of turning my radio completely off, is there a frequency within the US (or even an ARTCC) that will always be silent, but can easily swap back to a working frequency?



Some have suggested just turning the volume down and back up.
That is functional, but not quite as easy as pressing the XFER button, since the volume may be too loud or too soft after adjusting it.

I like the idea of trying the low-power frequencies that I'm less likely to hear; but I am ultimately hoping to learn of a frequency marked "do not transmit on".
From the document referenced by mongo,


  Frequencies (MHz): 121.425 - 121.475Use: Band Protection for 121.5
  Frequencies (MHz): 121.525 - 121.575Use: Band Protection for 121.5


It seems that these frequencies exist only to be silent space around Guard/121.5.

No one should transmit on them, and you should probably hear total silence there.

I think these are an excellent place to look for quiet space.