On wikipedia it says
Keijo!!!!!!!! (Japanese: 競女!!!!!!!!, lit. "Competitive Girl"), also known as Hip Whip Girl, is a Japanese sports manga series by Daichi Sorayomi. It has been serialized in Shogakukan's shōnen manga magazine Weekly Shōnen Sunday since July 2013 and has been collected in fourteen tankōbon volumes.
and confirming Shogakukan's Weekly Shōnen Sunday
Weekly Shōnen Sunday (Japanese: 週刊少年サンデー Hepburn: Shūkan Shōnen Sandē) is a weekly shōnen manga magazine published in Japan by Shogakukan since March 1959. Contrary to its title, Weekly Shōnen Sunday issues are released on Wednesdays.
now looking at the wikia there is 159 Chapters with 151 Chapters in tankōbon format.
Keijo!!!!!!!! manga series is written and drawn by Daichi Sorayomi. It has been serialized in Weekly Shōnen Sunday since July 2013 and has been collected in twelve tankōbon volumes along with 151 chapters.
my number of 159 is based off that at the end of the page the last chapter number is 159. also you can see the tankōbon volumes vary in their release dates.
starting at the first Wednesday of July 2013 to the Wednesday just past (04/01/2017) we can see there has been 183 weeks passed. now if 1 chapter of Keijo!!!!!!!! is released every week there is a discrepancy of 24 weeks (
183-159 = 24) but these can be accounted for by holidays and that i don't know when in July the first chapter of Keijo!!!!!!!! came out (so it may not have been 03/07/2013).
with this information we can roughly guess that Keijo!!!!!!!! is being released weekly in each issue of Weekly Shōnen Sunday in Japan with some breaks for holidays. of cause without having the issues themselves i can't be for certain that each issue has had 1 chapter of Keijo!!!!!!!!
as i pointed out in my comment the Mangaupdates page has a "releases" section but these are the scanlation releases as such the release of these are not predefined especially since these are unofficial. not to mention that the this list should stop being updated if/when Keijo!!!!!!!! is officially licensed in English to which would generally mean they would be released in tankōbon format