The cumulative frequency of all types of the same length sharing the same initial trigram; this is a measure used in research on reading (cf. Kennedy, Pynte and Ducrot 2002).

For case-insensitive familiarity, please see Type DC familiarity in the Types DC table.

For the same measure, but calculated across all word lengths, please see Initial trigram.

Data type:

Data type:
Corpus frequency
Data subtypes
Absolute value, normalized value, absolute value log10, normalized value log10, rank, rank 123
Basis of normalization
per million tokens
Query operators
greater or equal, lower or equal
Null value

Available in tables:

Also, in the ngrams tables, you can use this filter on any of the components: