These parameters control the information you get back when requesting the top retweeted tweets in a stream. Note: a Tweet must be retweeted at least 3 times in order to be considered a top retweet.
“a” is all time. “2012070412” is July 4, 2012 at 12PM UTC. Type: string(ish) Default: a (all-time) Example Value(s): a, 2012070412
Notes: Accepts a string list delimited by commas. All hours specified will be in UTC and formatted as yyyyMMddHH (Java SimpleDateFormat pattern). Either top_periods or top_periods_relative can be used per request. The result would be an object with the hour (UNIX timestamp) as the key and an array of Top Retweeted Tweets as the value.