upswing
US /ˈʌp.swɪŋ/
UK /ˈʌp.swɪŋ/

1.
reprise, essor, hausse
an increase in strength or quantity; an upward trend
:
•
The economy is showing a clear upswing.
L'économie montre une nette reprise.
•
There has been an upswing in public interest in local politics.
Il y a eu un regain d'intérêt public pour la politique locale.