Preaching should not bore and irritate people. Preaching should be done at regular intervals at appropriate and suitable time
Hadith
حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، قَالَ حَدَّثَنِي شَقِيقٌ، قَالَ كُنَّا نَنْتَظِرُ عَبْدَ اللَّهِ إِذْ جَاءَ يَزِيدُ بْنُ مُعَاوِيَةَ فَقُلْنَا أَلاَ تَجْلِسُ قَالَ لاَ وَلَكِنْ أَدْخُلُ فَأُخْرِجُ إِلَيْكُمْ صَاحِبَكُمْ، وَإِلاَّ جِئْتُ أَنَا. فَجَلَسْتُ فَخَرَجَ عَبْدُ اللَّهِ وَهْوَ آخِذٌ بِيَدِهِ فَقَامَ عَلَيْنَا فَقَالَ أَمَا إِنِّي أَخْبَرُ بِمَكَانِكُمْ، وَلَكِنَّهُ يَمْنَعُنِي مِنَ الْخُرُوجِ إِلَيْكُمْ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَتَخَوَّلُنَا بِالْمَوْعِظَةِ فِي الأَيَّامِ، كَرَاهِيَةَ السَّآمَةِ عَلَيْنَا.
Narrated Shaqiq:
While we were waiting for `Abdullah (bin Mas`ud). Yazid bin Muawiya came. I said (to him), "Will you sit down?" He said, "No, but I will go into the house (of Ibn Mas`ud) and let your companion (Ibn Mas`ud) come out to you; and if he should not (come out), I will come out and sit (with you)."
Then `Abdullah came out, holding the hand of Yazid, addressed us, saying, "I know that you are assembled here, but the reason that prevents me from coming out to you, is that Allah's Messenger (ﷺ) used to preach to us at intervals during the days, lest we should become bored."
Sahih al-Bukhari 6411
In-book : Book 80, Hadith 106
Dawaah should not result in boredom and irritation, Do not bore and irritate people by Dawaah, Give Dawaah at appropriate and suitable time, Dawaah should be given after regular intervals, There should be intervals during dawaah