Complex sentence: It was originally sung only in the home, but has been used in the synagogue since the nineteenth century or earlier.In more recent years, for some reason, of its six stanzas sometimes only the first stanza is sung (or the first and fifth).
Split into simpler sentences: It was originally sung only in the home, but has been used in the synagogue since the nineteenth century or earlier. Of its six stanzas sometimes only the first stanza is sung (or the first and fifth).