Sense & idiom frequencies
Understanding how often particular meanings and expressions occur, to inform what a learner studies next.
The frequency of a word is only a starting point. Common spellings can have rare meanings, and useful expressions may contain several words. Learning priorities need to account for those distinctions.
A concept extractor gives us a way to count occurrences of particular senses and expressions in learning materials. Combined with the Knowledge Prediction model, those counts can help identify concepts that are both useful to a learner and not yet known.
This is a research direction within our concept-extraction and knowledge-graph work. The linked article explains the applications; it is not a separate frequency-dataset release.