sorry im quite bad at explaining, but ill try my best. ill check that site out as well thanks

basically its being saved in the thing called SRAM, if im correct. which is similar to normal ram but its for special functions. Basically its just implemented as static ram. with an address of F69H for CAP1BUFH, which is the place where "capture 1 register highbyte", the place where the measurement (period in my case) has been stored temporarily, till it is overwritten by the next measurement.