some years ago when i carried out a critical study on numbers of salat, from quran, the verse below finally tilted the balance in favour of 2 time salat,
24-58 O you who believe, let those who are your dependants and have not yet attained puberty request your permission regarding three times: Before the Dawn assembly, and during the noon-time when you put-off your outer garments, and after the Evening assembly. These are three private times for you. Other than these times, it is not wrong for you or them to invite or visit others. God thus clarifies the revelations for you. And God is Knowledgeable, Wise.