The sections that describe the building
The premises description sets the context: address, building type, floors occupied, approximate area, occupancy, operating hours and public access. It reads as background and it does real work, because a bidder who has not visited can immediately see whether the requirement matches their capability. The area schedule then lists every space by name with its floor finish and approximate size, which is the spine everything else hangs from.
The task and frequency schedule comes next, organised by area rather than by task type. Each line names a task, a frequency expressed as a number, and where useful a short condition statement. Organising by area means a cleaner can work through the document room by room, and it makes an omission visible, because a room with three lines against it stands out next to one with twelve.
