tail -n +2 ping.out | awk '{ print $7 }' | awk -F'=' '{ print $2 }' | awk -F'.' '{ print $1 " ms" }' | sort -n | uniq -c | sort -k 2 -n
     15 12 ms
     48 13 ms
     31 14 ms
     17 15 ms
     15 16 ms
      5 17 ms
      1 18 ms
      2 19 ms
      1 20 ms
      1 21 ms
      1 23 ms