International cricket has 3 formats of matches: T20Is/IT20s (T20 Internationals/International T20s; last ~3-4 hrs), ODIs (One-Day Internationals; last a day), and Test cricket (last a maximum of 5 days). The former two have a sort of a "pitch limit" per innings. Test matches don't have that.

And an innings in cricket ("innings" is both singular and plural in cricket) is if all the players of a team are out and/or the pitch limit is reached or if the batting captain feels that their team has scored enough runs, and so declares the end of their batting innings (this is called a "declaration", and only happens in Test cricket). So the concept of a "half-Inning" doesn't exist in cricket.

Test cricket has 2 batting innings (and hence two bowling innings) per side, while the other two formats have one each and thus last for a shorter period of time (which is also because of the pitch limit which is built-in as part of those formats).