I can reproduce this and I'm pretty sure it's meant to say in the second sentence "0% of all 738.755 visits in Jul 2020".

@tsteur,

Yes correct, this should be visits instead of searches.

I'll take this and submit a PR :)

So, I've nailed this down to the file plugins/CoreVisualizations/templates/_dataTableViz_htmlTable_ratio.twig, where the second sentence is generated by
{% if totalPercentage|default is not empty %} {% set totalRatioTooltip = 'General_TotalRatioTooltip'|translate(totalPercentage, siteTotal|number(2,0), metricTitle, periodTitlePretty) %}

The problem is that metricTitle is defined earlier as
{% set metricTitle = translations[column]|default(column) %}
and is also used in the first sentence
{% set reportRatioTooltip = 'General_ReportRatioTooltip'|translate(label, rowPercentage|e('html_attr'), reportTotal|e('html_attr'), metricTitle|e('html_attr'), '"' ~ segmentTitlePretty ~ '"', translations[labelColumn]|default(labelColumn)|e('html_attr')) %}

Thus it looks like they cannot really be detached and whatever goes in the first sentence will go in the second as well, or am I wrong? I am wondering if that tooltip ever even worked fine, since looking bback at past commits it looks like the relevant file has always been the way it is now
3f26e78#diff-02df9be9bffb622de389dc42a0cd753d

(I'm having a bit of an issue with setting up a good dev environment because of #16515)