The word(s) "should" appears 389 time(s) in 321 verse(s) in Quran in Muhammad Habib Shakir translation.

(81) And that you should judge between them by what Allah has revealed, and do not follow their low desires, and be cautious of them, lest they seduce you from part of what Allah has revealed to you; but if they turn back, then know that Allah desires to afflict them on account of some of their faults; and most surely many of the people are transgressors.

(82) But you will see those in whose hearts is a disease hastening towards them, saying: We fear lest a calamity should befall us; but it may be that Allah will bring the victory or a punishment from Himself, so that they shall be regretting on account of what they hid in their souls.

(83) And what (reason) have we that we should not believe in Allah and in the truth that has come to us, while we earnestly desire that our Lord should cause us to enter with the good people?

(84) O you who believe! call to witness between you when death draws nigh to one of you, at the time of making the will, two just persons from among you, or two others from among others than you, if you are travelling in the land and the calamity of death befalls you; the two (witnesses) you should detain after the prayer; then if you doubt (them), they shall both swear by Allah, (saying): We will not take for it a price, though there be a relative, and we will not hide the testimony of Allah for then certainly we should be among the sinners.

(85) Then if it becomes known that they both have been guilty of a sin, two others shall stand up in their place from among those who have a claim against them, the two nearest in kin; so they two should swear by Allah: Certainly our testimony is truer than the testimony of those two, and we have not exceeded the limit, for then most surely we should be of the unjust.

(86) This is more proper in order that they should give testimony truly or fear that other oaths be given after their oaths; and be careful of (your duty to) Allah, and hear; and Allah does not guide the transgressing people.

(87) They said: We desire that we should eat of it and that our hearts should be at rest, and that we may know that you have indeed spoken the truth to us and that we may be of the witnesses to it.

(88) Isa the son of Marium said: O Allah, our Lord! send down to us food from heaven which should be to us an ever-recurring happiness, to the first of us and to the last of us, and a sign from Thee, and grant us means of subsistence, and Thou art the best of the Providers.

(89) And when Allah will say: O Isa son of Marium! did you say to men, Take me and my mother for two gods besides Allah he will say: Glory be to Thee, it did not befit me that I should say what I had no right to (say); if I had said it, Thou wouldst indeed have known it; Thou knowest what is in my mind, and I do not know what is in Thy mind, surely Thou art the great Knower of the unseen things.

(90) If Thou shouldst chastise them, then surely they are Thy servants; and if Thou shouldst forgive them, then surely Thou art the Mighty, the Wise.