fix: confusing wording for billing cycle

docs: update screenshots on readme

includes/i18n/de.php

@@ -42,6 +42,10 @@ $i18n = [
     "Weekly"          => "Wöchentlich",
     "Monthly"         => "Monatlich",
     "Yearly"          => "Jährlich",
+    "dayly"           => "Tag(e)",
+    "weekly"          => "Woche(n)",
+    "monthly"         => "Monat(e)",
+    "yearly"          => "Jahr(e)",
     "days"            => "Tage",
     "weeks"           => "Wochen",
     "months"          => "Monate",
@@ -58,7 +62,7 @@ $i18n = [
     "search_logo"     => "Logo im Web suchen",
     "web_search"      => "Websuche",
     "currency"        => "Währung",
-    "billing_cycle"   => "Abrechnungszeitraum",
+    "payment_every"   => "Zahlung alle",
     "frequency"       => "Abrechnungsfrequenz",
     "cycle"           => "Zeitraum",
     "next_payment"    => "Nächste Zahlung",