incremental reading
AI says: Incremental reading is a knowledge-management and learning technique where large texts are broken into progressively smaller, prioritized pieces that are reviewed over time using spaced repetition. Instead of trying to read and understand an entire article or book in one sitting, the reader extracts important passages, highlights, or notes and schedules them for future review.
On each pass, they may further refine the material—condensing it, extracting key ideas, or turning it into flashcards—so the most important information gradually becomes more distilled and memorable. The method is designed to balance breadth and retention: it allows learners to continuously ingest new material while repeatedly revisiting and strengthening understanding of previously encountered ideas.
More information at Wikipedia article about incremental reading