What did people in the 16th and 17th centuries mean by the term speed? Did they have
$$\text{speed} = \frac{ \text{distance} }{ \text{time} }$$
back then? Or did they have some other notion of speed and this relation came into being somewhat later ?
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1Possible duplicate of When and by whom was the earliest definition of speed given? – Francois Ziegler Oct 27 '18 at 12:00
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See the post : Galileo's Discussion of Uniform Motion : Galileo defines uniform speed in Two new sciences, Third Day, as follows : "By steady or uniform motion, I mean one in which the distances traversed by the moving particle during any equal intervals of time, are themselves equal." – Mauro ALLEGRANZA Oct 28 '18 at 10:07