find_commonest_chars (histogram, "\"'", "", &ia->separators->quotes);
find_commonest_chars (histogram, ",;:/|!\t-", ",", &ia->separators->separators);
find_commonest_chars (histogram, "\"'", "", &ia->separators->quotes);
find_commonest_chars (histogram, ",;:/|!\t-", ",", &ia->separators->separators);