Letters that make extremely high frequency
e, f, g, l, n, c, h, m, r, t, i, q, u, y, x are letters that make 'extremely high frequency'
Words within extremely high frequency
el, high frequency, eq, hi, re, XT, frequency, REM, em, en, EL, extreme, high, ex, extremely, HI, ME, NC, Re, Fr, Ig are words within 'extremely high frequency'