?repeats the group contents below at most once:
Non-Capturing Group(?:\s*(?:or|up to|and|to))* *repeats the group contents below any number of times:
\s*any whitespace character, repeated any number of times
Non-Capturing Group(?:or|up to|and|to) orthe literal text or (case sensitive) up tothe literal text up to (case sensitive) andthe literal text and (case sensitive) \h*any horizontal whitespace character, repeated any number of times
Group second_digit(?<second_digit>\d+) Non-Capturing Group(?:\s*(?:more|another))? \s*any whitespace character, repeated any number of times
secondthe literal text second (case sensitive) s?optionally matches the literal s (11510 / 1638 / 7316) (case sensitive)