?repeats the group contents below at most once:
Non-Capturing Group(?:-|to) -the literal - (4510 / 558 / 2D16)
tothe literal text to (case sensitive) \s*any whitespace character, repeated any number of times
Group 2([0-9]{1,2}(?:\.[0-9]+)?) Character Class[0-9]{1,2} {1,2}matches between 1 and 2 characters from the set below:
0-9one character from 0 (4810) to 9 (5710)
Non-Capturing Group(?:\.[0-9]+)? ?repeats the group contents below at most once:
\.the literal . (4610 / 568 / 2E16)
+matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
\s*any whitespace character, repeated any number of times