Time signatures fraction style for 4/4 and 2/2

The symbol of the time signature can be customized with the style property. Setting it to #'() uses fraction style for 4/4 and 2/2 time.

\version "2.24.0"

%% http://lsr.di.unimi.it/LSR/Item?id=179

%LSR modified by P.P.Schneider on Feb.2104

{
    \time 4/4 c'1
    \time 2/2 c'1
    
  \numericTimeSignature
  % or: 
  %\override Staff.TimeSignature.style = #'numbered
    \time 4/4 c'1
    \time 2/2 c'1
}