Examples - instruction loops, loop variables. Spatial Locality - Items that are located near each other in memory are likely to have similar access patterns, allowing a fetch of several nearby items to be useful. This factor makes larger cache or disk fetches to bring in non-demanded data that will likely be used. Examples - arrays, instruction streams. Sequential Locality - Memory locations are accessed in order in some types of data accesses.
Examples are intructions streams and disk accesses.
This can be considered a form of spatial locality. These blocks then become known as subsectors and all the address tag with associated subsectors are the sector or sector frame. The set of pages, cache lines, etc., accessed over a given period of time.