70.07% of <span class="searchmatch">head</span>= <span class="searchmatch">arguments</span> are <span class="searchmatch">ambiguous</span> unless one assumes breves; I could make a few more assumptions, especially about diphthongs, to lower this substantially...
lsj <span class="searchmatch">Isomorphyc</span>/<span class="searchmatch">Sandbox</span>/<span class="searchmatch">grc</span>-<span class="searchmatch">rows</span>-<span class="searchmatch">ipa</span>/5 no lsj entry <span class="searchmatch">Isomorphyc</span>/<span class="searchmatch">Sandbox</span>/<span class="searchmatch">grc</span>-<span class="searchmatch">rows</span>-<span class="searchmatch">ipa</span>/<span class="searchmatch">head</span> <span class="searchmatch">arguments</span> <span class="searchmatch">with</span> <span class="searchmatch">unmarked</span> <span class="searchmatch">ambiguous</span> <span class="searchmatch">vowels</span> <span class="searchmatch">Isomorphyc</span>/<span class="searchmatch">Sandbox</span>/lsj...
This is a version of Special:LongPages <span class="searchmatch">with</span> long pages in all namespaces except the main namespace. "Sortkey" column proves sorting by namespace number...