ration

Very important and common unit in early writing systems:

rations = mouths / heads to feed

𓂋 𓎡 𓄯 ration 𓂋 •r̥̄s ⇔ raš riš 𒊕 راس rās 𐤓𐤀𐤔 𒅗 raš רֹאשׁ rósh 𓁷 𓁶 𒊕

𒊑𒋗 re-šu head ⇔ Rüssel
𒊑𒋗 ra-tio ratio