When did spelling "-ic" words "-ick" start/stop being popular?
Solution 1:
Apparently its usage was common till early 1800s.
-ic
In Middle English and after often spelled -ick, -ike, -ique. Variant forms in -ick (critick, ethick) were common in early Modern English and survived in English dictionaries into early 19c.
This spelling was supported by Johnson but opposed by Webster, who prevailed.
(Etymonline)