Consulting the Codex…
RS3 · Skills · Activities · Quests
The Codex keeps its readings for 400 days, so you can go back that far, to the first day it read mdog.
Herblore 93 → 96, 2.0m XPWeakest area: Potions. Herblore 93 → 96, 2.0m XP. Quests need a public profile, so the quest checks are left out of the score.