while read date doc freq num total; do
P="$_DATA/pages$(UNSTRING "$doc")"
d="$(stat -c %Y -- "$P/#index.flag" 2>&-)"
- [ "$d" -le "$date" ] 2>&- || continue
+ [ "$d" -le "$date" -a -f "$P/#page.md" ] 2>&- || continue
printf '%s %f\n' "$doc" "$freq"
done <"$I/$w"