| frequenciesOverTime Plot frequency of query expressions over time |
| frequenciesOverDomains Box plot frequency of query expressions per topic domain |
| conditionsOverTime Plot frequency of query expressions over time under different conditions |
| alternativesOverTime Plot proportion of alternative spellings/variants over time |
| regional Map plot regional frequencies of query expression |
| mosaicplot Visualize frequencies of alternative query terms in relation to other variables |
| highcharter-example Visualize frqequencies of optionally alternative terms over time with interactive HTML and JavaScript elements using the package highcharter as wrapper for Highcharts |
| rcharts-highcharts Visualize term frqequencies over time with interactive HTML and JavaScript elements |