Roland Blass' comment 5

Comment:

"Sec: 10.7.4.2.:
"A peer SHOULD NOT send Ping requests looking for new finger table
entries more often than the configuration element "chord-ping-
interval", which defaults to 3600 seconds (one per hour)."
This paragraph should probably moved some paragraphs down as it
has been stated yet that a peer should actually send Ping requests
at all (this is explained in the subsequent paragraphs)."

- Modification as suggested.