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. 2022 Jul 27;7:863126. doi: 10.3389/frma.2022.863126

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Copyright © 2022 Mariani, Francopoulo, Paroubek and Vernier.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Overview of the GapChart (2000 to 2011) illustrating the parameters. Years appear on the X-axis, and ordered terms (here according to their presence) appear on the Y-axis (10 terms in each color).