function fraction=fractionTime2(x,y,th1)
% FRACTIONTIME2 calculates the fraction of time 
% where the number of visits to each site (recurrence) 
% is below given threshold.
%
% In order to improve SNR, total visits to three
% consecutive sites are computed. 
% 
% 	X,Y - positions
% 	TH1 - threshold
%
C1=CircleMethod3(x,y); %number of visits
C1=C1(~isnan(C1));
n=length(C1); 
for i=1:floor(n/3)
    CC(i)=sum(C1(3*(i-1)+1:3*(i-1)+3)); 
	%add visits from 3 consecutive sites
end
CCnew=[CC;CC;CC];
CCnew1=reshape(CCnew,1,floor(n/3)*3);
f1=(find(CCnew1>th1));
l=length(f1);
fraction=l/(floor(n/3)*3);