Spiral Curve with specified distances

Hi guys,
I’m stuck in how to create a spiral curve with specified distances. What I need is capable of controlling the distance between them.
Any help would be greatly appreciated. Thanks in advance, guys !
s1

I don’t think it’s the best solution, anyway, when if your spiral changes only at the last frequency period…

Spiral_As_Specified_Period_re.gh (18.4 KB)

Your answer helped me a lot, HS_Kim. Thank you so much !