たちまち  => Immediately, Quickly, Suddenly, In a moment or flash N2
Status
... るとか ... るとか => それとも... または N4
Demonstrate by example
ひとつまちがえば => Just (negligence) N3
Ability
ちゃんとする => Serious, tidy, complete N3
Result status
または => or N4
ままになる => Just let... N4
Continuous
がちです/がちになる => A tends to become/happen/occur N2
Potential, Possibility
~ではあるまいし      => it's not like; it isn't as if ~ N1
ではあるまいか => isn't it; I wonder if it's not ~ N2
Evaluate
~きわまる/きわまりない(~極まる/極まりない)      => extremely; very ~ N1
あるいは~あるいは~ => or, either N3
Line up, list
まんいち => emergency; unlikely event​; by some chance; by some possibility N2
Assumed conditions