Charak Samhita
पक्षाद्वा द्वादशाहाद्वा मासाद्वा कुपिता मलाः। अपस्माराय कुर्वन्ति वेगं किञ्चिदथान्तरम् ॥१३॥
॥ Diagnosis as per frequency of seizures॥ The vitiated doshas lead to paroxysms of apasmara once in fifteen days, twelve days or a month. The paroxysm may occur even after a shorter period.
english translation
pakSAdvA dvAdazAhAdvA mAsAdvA kupitA malAH। apasmArAya kurvanti vegaM kiJcidathAntaram ॥13॥
hk transliteration by Sanscript