Not upto speed on .tcshrc csh.cshrc savehist

[jb_daefo]

I have tried multiple, maybe too few, variations of copy-paste .tcshrc csh.cshrc and the like, unable to duplicate in (t)csh HISTSIZE HISTFILE SAVEHIST zsh settings, and maybe even their bash equivalents.
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For lack of time to test ones I've on-disk but not put into production, does anyone have any WORKING save the (t)csh histories ?
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Thanks.