רָכַשׁ Swift steeds
Every verse in which this word stands — 4 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.
The rechesh — the fast horses of the king's service in Melachim, Michah and Esther. Whether a breed, a relay animal or simply the swiftest of the stable is discussed.
וְהַשְּׂעֹרִים וְהַתֶּבֶן לַסּוּסִים וְלָרָכֶשׁ יָבִאוּ אֶל־הַמָּקוֹם אֲשֶׁר יִֽהְיֶה־שָּׁם אִישׁ כְּמִשְׁפָּטֽוֹ
Barley also and straw for the horses and swift steeds brought they unto the place where it should be, every man according to his charge.
רְתֹם הַמֶּרְכָּבָה לָרֶכֶשׁ יוֹשֶׁבֶת לָכִישׁ רֵאשִׁית חַטָּאת הִיא לְבַת־צִיּוֹן כִּי־בָךְ נִמְצְאוּ פִּשְׁעֵי יִשְׂרָאֵֽל
Bind the chariots to the swift steeds, O inhabitant of Lachish; She was the beginning of sin to the daughter of Zion; For the transgressions of Israel are found in thee.
וַיִּכְתֹּב בְּשֵׁם הַמֶּלֶךְ אֲחַשְׁוֵרֹשׁ וַיַּחְתֹּם בְּטַבַּעַת הַמֶּלֶךְ וַיִּשְׁלַח סְפָרִים בְּיַד הָרָצִים בַּסּוּסִים רֹכְבֵי הָרֶכֶשׁ הָֽאֲחַשְׁתְּרָנִים בְּנֵי הָֽרַמָּכִֽים
And they wrote in the name of king Ahasuerus, and sealed it with the king’s ring, and sent letters by posts on horseback, riding on swift steeds that were used in the king’s service, bred of the stud;
הָרָצִים רֹכְבֵי הָרֶכֶשׁ הָֽאֲחַשְׁתְּרָנִים יָֽצְאוּ מְבֹהָלִים וּדְחוּפִים בִּדְבַר הַמֶּלֶךְ וְהַדָּת נִתְּנָה בְּשׁוּשַׁן הַבִּירָֽה
So the posts that rode upon swift steeds that were used in the king’s service went out, being hastened and pressed on by the king’s commandment; and the decree was given out in Shushan the castle.
Quick answers
What is the Hebrew word for swift steeds?
Swift steeds in Hebrew is רכש, with a gematria of 520 in the standard method.
How many times is the swift steeds mentioned in the Tanakh?
The word stands 4 times in the Tanakh, first at 1 Kings 5:8.
A spelling is not a word. The bare letters רכש stand 4 times in the corpus, which is a different question and often a different number: the same letters can spell a name or another word entirely, and the creature written with a particle attached is a spelling that search never returns. It is here, as itself.
See all 4 occurrences of the spelling רכש →