orx / a wall
x / verbose
Iambic is the most common metrical measure in English verse. A line from Christopher Marlow serves to illustrate:
x / x / x / x / Come live | with me | and be | my love.
Quite often an iambic pentameter (an iambic line of 10 syllables--five feet consisting of two syllables each) is slightly irregular, for instance the opening line of Frost's "Mending Wall":
x / x / x / x / x / Something | there is | that does | n't love | a wall.