Ineed someone can explain this grammar to me? “adverbs and expressions of frequency” .

Adverbs of frequency go before the main verb

Explanation:

Adverbs of frequency go after "be": He’s always late. Expressions of frequency (every day, twice a week, once a month etc) usually go at the end of a sentence.

we should all just get dogs.

the symbol of the grandfather's heritage in this excerpt from "the medicine bag,” is the beaded bolo tie.

a bolo tie is a cord fastened around the neck with an ornamental clasp which is worn as a necktie. they have been used by native american tribes such as hopi, navajo, zuni, and puebloans since the mid-20th century.

therefore, the fact that the grandfather is wearing a bolo tie refers to his heritage as native american.