Variable: dframe-timer
dframe-timer is a buffer-local variable defined in dframe.el.gz.
Documentation
The dframe timer used for updating the buffer.
Probably introduced at or before Emacs version 22.1.
Source Code
;; Defined in /usr/src/emacs/lisp/dframe.el.gz
(defvar-local dframe-timer nil
"The dframe timer used for updating the buffer.")