Where does “frequentíssimo” come from?

frequentíssimo (Portuguese) comes from Portuguese freqüente, from Latin frequens, from Proto-Italic frekʷents, from Proto-Indo-European bʰrekʷ- — to condense; to crowd together.

Ancestry of “frequentíssimo”, step by step

Step	Language	Word	Meaning
1	Portuguese	freqüente	Superseded spelling of frequente
2	Latin	frequens	crowded, crammed, packed; frequent, repeated
3	Proto-Italic	frekʷents	—
4	Proto-Indo-European	bʰrekʷ-	to condense; to crowd together

Every word from Proto-Indo-European bʰrekʷ- →Every word from Proto-Italic frekʷents →Every word from Latin frequens →