German nouns ending in -heit
-heit makes a noun out of an adjective, and it is always feminine: frei, die Freiheit.
Say the article and the noun together. The ending is a hint, not a word.
On the 144 common nouns with this ending in the frequency list behind these rules, 97.2% take die. We label that “almost always”. The count is from german-nouns (Wiktionary, CC BY-SA 4.0). It is not an exam pass rate.
The list we teach has no exception for this ending. Still say the article with the noun, not the ending alone.
Examples the course uses
- die Gesundheit
- die Sicherheit
- die Gewohnheit