I can only tell for the EBU naming convention. Here only full frames per second are counted and the “i”/”p” tell it is interlaced/progressive.
Thus according to EBU at this time there is no 50i or 59,94i or 60i video standard because this would mean it’s 50/59,94/60 full frames per second according to 100/119,88/120 fields interlaced.
According to EBU 25i are 50 fields counted as 25 full frames each second – 29,97i are 59,94 fields counted as 29,97 full frames each second.