The time for my WPA2 Password cracking increased a lot after secifying chrset

[Super_X]

Ok. I´ve seen those and they could be useful, but I don´t know where it could be the position of those. Is there any method that I could say to hashcat to try the keywords in different positions in the password and fill the rest 8 to 18 characters with random alphanumeric and uppercase-alphanumeric characters? Because, those methods would actually need me to know where would the word be situated on the password as far as I can understand. Also, could I add like 2 words, but hashcat would try combinations with only one, then with the 2 then with the other and so on?

Thank You for your support.