What are the total occurence of words that paired with "nombre"?
total occurrence refers to sum(occurrences); paired with "nombre" refers to w1st.word = "nombre" or w2nd.word = "nombre"
SELECT SUM(T2.occurrences) FROM words AS T1 INNER JOIN biwords AS T2 ON T1.wid = T2.w1st OR T1.wid = T2.w2nd WHERE T2.w1st IN (( SELECT wid FROM words WHERE word = 'nombre' ) OR T2.w2nd IN ( SELECT wid FROM words WHERE word = 'nombre' ))