No. Anatomic Adaptation Phase (AAP) is used prior accumulation weights or can progress to them over couple of weeks.
Accumulation and Intensification are concepts referring to LOAD PROGRAMMING. Accumulation is overload by volume, while intensification is overload by intensity. AAP is a specific period aimed at reaching certain goals. You can also utilize Volume/Intensity overloads in AAPs, depending on the level of the athlete, although the loads during the AAP should be not that high in terms of intensivness.
For more info check this series of articles.
Think of it like a Wave… after serious pounding, emotional draining you need to go back to basics, provide a good ‘base’ for later gains and remove any mental/emotional blocks/strain acquired during heavy training. You can’t pound continuously.