Query Parameters

Order by: Age MLU
Age range: to months.
Group size: months.
MLU range: to .
Group size:
Split sexes:

Quick Help

Here follows a short description of the query parameters. For more info please see the FAQ.

Search Bar: Here you can enter one or multiple words. Words that should be counted separately are separated by ','. Words that should be counted together are separated by '|'. '*' can be used as a wild-card character. E.g. the search string: 'dino*, dog|cat' would yield a two line graph with one line showing frequencies of words beginning with 'dino' and the other line showing frequencies of 'dog' and 'cat'.
Order by: Decides whether word frequencies will be ordered according to the age of the children or the MLU (Mean Length of Utterance).
Age/MLU range:Range of the age/MLU of the children to be included.
Group size: Decides how the data is grouped. A group size of 12 months will yield a graph where e.g. the data point labeled 24 will include children in the range 24 ≥ AGE < 36.
Split sexes: Splits the data by the sex of the children. Will result in an graph with twice the lines as entered search terms.

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Welcome to ChildFreq !

Childfreq is shutting down in 2021. We reccomend you use the childes-db tool instead.

ChildFreq is a tool that lets you extract word frequencies from the Childes database. Childes is a database of child language where researchers from all over the world have contributed with transcriptions of child interaction. ChildFreq searches the American and British parts of Childes which consists of more than 5,000 transcriptions, in total ~3,500,000 words. Frequency can be ordered as a function of age or MLU (Mean Length of Utterance) and it is possible to split the data by sex.

Go ahead; check out the quick help to the left, try enter a word in the search bar, and press 'Calculate Frequencies'!


ChildFreq was built as a part of the VAAG project funded by the European Science Foundation and the CCL project funded by the Swedish Research Council.
If you use ChildFreq in your research please cite the technical report:

Rasmus Bååth (2010). ChildFreq: An Online Tool to Explore Word Frequencies in Child Language. LUCS Minor, 16.

that can be found here.


The creator of ChildFreq is Rasmus Bååth, research assistant at Lund University Cognitive Science. If you want to know more about him check out his webpage. If you have questions, feedback or ideas regarding ChildFreq don't hesitate to send an e-mail to rasmus.baath@lucs.lu.se.

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