As nouns the difference between tendancy and tendance
is that tendancy is while tendance is (archaic) the act of attending or waiting; attendance.
tendance
English
Noun
(
en noun)
(archaic) The act of attending or waiting; attendance.
*
(obsolete) Persons in attendance; attendants.
* 1607 , , I. i. 83:
- his lobbies fill with tendance , / Rain sacrificial whisperings in his ear,
References
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