§ 122. When petition may be presented. A person so imprisoned may
apply for such a discharge, at any time; unless the sum, or, where he is
imprisoned by virtue of two or more executions, the aggregate of the
sums, for which he is imprisoned, exceeds five hundred dollars; in which
case, he cannot present such a petition, until he has been imprisoned,
by virtue of the execution or executions, for at least three months.