Programming

0, 0, 0, 56, 86
1, 524, 3, 6, 65
1, 624, 0, 43, 33
2, 72, 0, 43, 80
3, 26, 3, 6, 86
4, 323, 3, 1459, 95
5, 325, 3, 1459, 33
6, 225, 3, 1436, 57

echo "0, 0, 0, 56, 86
1, 524, 3, 6, 65
1, 624, 0, 43, 33
2, 72, 0, 43, 80
3, 26, 3, 6, 86
4, 323, 3, 1459, 95
5, 325, 3, 1459, 33
6, 225, 3, 1436, 57
7, 225, 3, 1436, 86
8, 225, 3, 1436, 57
9, 225, 3, 1436, 95
10, 225, 3, 1436, 33
11, 524, 3, 6, 86
12, 624, 0, 43, 95
13, 72, 0, 43, 33" | 
awk -F"," '$5~/86/{a=NR}
$5~/95/{b=NR}
$5~/33/{c=NR;if(a==b-1 && b==c-1) s++}END{print "Sequence is repeated",s,"times"}'
Sequence is repeated 2 times

cat inputfile
0, 0, 0, 56, 11
1, 524, 3, 6, 74
1, 624, 0, 43, 33
2, 72, 0, 43, 80
3, 26, 3, 6, 86
4, 323, 3, 1459, 95
5, 325, 3, 1459, 33
6, 225, 3, 1436, 57
7, 225, 3, 1436, 86
8, 225, 3, 1436, 57
9, 225, 3, 1436, 95
10, 225, 3, 1436, 33
11, 524, 3, 6, 86
12, 624, 0, 43, 95
14, 72, 0, 43, 33
15, 72, 0, 43, 11
16, 72, 0, 43, 74
17, 225, 3, 1436, 33
18, 225, 3, 1436, 11
19, 225, 3, 1436, 74
20, 225, 3, 1436, 33

awk 'BEGIN{print "Sequence Found|Occurrences";OFS="|"}
{a[NR]=$5;nr=NR}
{for(i=1;i<=nr-2;i++) S[i]=a[i]"-"a[i+1]"-"a[i+2]}
{for(j=1;j<=nr-2;j++) $1=sprintf("%s", S[j]);c[$1]++}
END{for (m in c) if(m~/-/) print m,c[m]}' inputfile
Sequence Found|Occurrences
33-86-95|1
57-95-33|1
74-33-80|1
33-11-74|2
57-86-57|1
95-33-57|1
80-86-95|1
95-33-86|1
86-57-95|1
95-33-11|1
74-33-11|1
86-95-33|2
11-74-33|3
33-57-86|1
33-80-86|1

awk 'BEGIN{print "Sequence Found|Occurrences";OFS="|"}
{a[NR]=$5;nr=NR}
{for(i=1;i<=nr-2;i++) S[i]=a[i]"-"a[i+1]"-"a[i+2]}
{for(j=1;j<=nr-2;j++) $1=sprintf("%s", S[j]);c[$1]++}
END{for (m in c) if(m~/-/ && c[m]>1) print m,c[m]}' inputfile
Sequence Found|Occurrences
33-11-74|2
86-95-33|2
11-74-33|3