The word(s) "neck" appears 18 time(s) in 18 verse(s) in Quran in Mohsin Khan translation.

(11) If We will, We could send down to them from the heaven a sign, to which they would bend their necks in humility.

(12) Those who were deemed weak will say to those who were arrogant: "Nay, but it was your plotting by night and day: when you ordered us to disbelieve in Allah and set up rivals to Him!" And each of them (parties) will conceal their own regrets (for disobeying Allah during this worldly life), when they behold the torment. And We shall put iron collars round the necks of those who disbelieved. Are they requited aught except what they used to do?

(13) Verily We have put on their necks iron collars reaching to the chins, so that their heads are raised up.

(14) Then he said "Bring them (horses) back to me." Then he began to pass his hand over their legs and their necks (till the end of the display).

(15) When iron collars will be rounded over their necks, and the chains, they shall be dragged along,

(16) So, when you meet (in fight - Jihad in Allah's Cause) those who disbelieve, smite (their) necks till when you have killed and wounded many of them, then bind a bond firmly (on them, i.e. take them as captives). Thereafter (is the time) either for generosity (i.e. free them without ransom), or ransom (according to what benefits Islam), until the war lays down its burden. Thus [you are ordered by Allah to continue in carrying out Jihad against the disbelievers till they embrace Islam and are saved from the punishment in the Hell-fire or at least come under your protection], but if it had been Allah's Will, He Himself could certainly have punished them (without you). But (He lets you fight) in order to test some of you with others. But those who are killed in the Way of Allah, He will never let their deeds be lost.

(17) (It is) freeing a neck (slave)

(18) In her neck is a twisted rope of Masad (palm fibre).