If you use the "pause" function, you can specify a time in seconds as the input. It does require integers and uses decimals as fractional seconds.
[G_d,G_o, isolated,active,phi] = Single_CF_initial(G,50,1,0.2);
waitTime = 15;
for tt = 2:25
if isolated(tt-1)- isolated(tt)==0
[G_d, isolated,Needremove] = Single_CF_Stages(G_d,phi,isolated,active);
[G_r,isolated] = H(G_d, G_o,0.95,isolated);
G_d = G_r;
If you don't know how long you'll actually need to pause in advance, using "input" is another option that pauses execution until an input is provided.