Извлечение вывода в оболочке

Con awk

awk -v nb=3 '{for(i=1;i<=NF;i++)if(++a[$i]>nb){print;next}}' infile

for(i=1;i<=NF;i++) on each field of the line
++a[$i] get each field in a associative array a and incremente it each time we saw a field with the same value.
if(++a[$i]>nb) if the value is more than nb
{print;next} print the line and jump to the next line

Para mostrar solo la línea connb

awk -v nb=3 '
{
    max = 0
    delete a
    for ( i=1 ; i<=NF ; i++ )
        ++a[$i]
    for( j in a )
        max = a[j]>max ? a[j] : max
    if ( max == nb )
        print
}' infile