יחמור Yachmur
Every verse in which this word stands — 2 places, in canonical order, first appearance to last. These are the places the lexicon carries under this word's own entry, counting every form the text writes it in, which is the number on the list.
In Devarim 14:5 among the kosher wild kinds, and on Shlomo's daily table. Traditionally the fallow deer or roebuck; the identification is discussed. The corpus writes it only with a particle attached.
אַיָּל וּצְבִי וְיַחְמוּר וְאַקּוֹ וְדִישֹׁן וּתְאוֹ וָזָֽמֶר
the hart, and the gazelle, and the roebuck, and the wild goat, and the pygarg, and the antelope, and the mountain-sheep.
עֲשָׂרָה בָקָר בְּרִאִים וְעֶשְׂרִים בָּקָר רְעִי וּמֵאָה צֹאן לְבַד מֵֽאַיָּל וּצְבִי וְיַחְמוּר וּבַרְבֻּרִים אֲבוּסִֽים
ten fat oxen, and twenty oxen out of the pastures, and a hundred sheep, beside harts, and gazelles, and roebucks, and fatted fowl.
Quick answers
What is the Hebrew word for yachmur?
Yachmur in Hebrew is יחמור, with a gematria of 264 in the standard method.
How many times is the yachmur mentioned in the Tanakh?
The word stands 2 times in the Tanakh, first at Deuteronomy 14:5.
A spelling is not a word. The corpus never writes יחמור bare — every one of its places carries a particle or a suffix on the front or the back — so the spelling above is the word's own headword, and the verses listed here are the only door to it.