But nowhere do I see a "frequency" variable defined in the behavioral models
and I never named "frequency" as a parameter value name in any of the device blocks to be varied.
I'm wondering where this variable is being created,
and if frequency isn't a variable you can sweep( according to your response
https://www.designers-guide.org/Forum/YaBB.pl?num=1227194040/6#6 ),
why does a "frequency" variable appear automatically and what is it/how is it passed along?