The phrase "a time when interest" is correct and usable in written English.
It can be used to refer to a specific period or moment in which interest in a particular subject or activity was significant or noteworthy.
Example: "There was a time when interest in renewable energy surged due to rising environmental concerns."
Alternatives: "a period of interest" or "an era of enthusiasm".
That is particularly important at a time when interest rates are dropping.
Coaches and club chairmen said the move was incomprehensible at a time when interest in tennis was unprecedented.
That makes these securities appealing, despite their higher risk, at a time when interest rates are low.
A new children's book may help shed light at a time when interest in the field seems to be growing.
The potential cost of American Dream could still jump given Triple Five's reliance on bonds at a time when interest rates in the bond market have been rising.
He argued that the proposal would be counterproductive to Fed monetary policy at a time when interest rates are so low.
It's a peculiar time when interest rates are zero while some corporate profits, like those at UPS and Federal Express and American Express, are flying.
There is a particular need to investigate students' attitudes about technology-enhanced science investigations in precollege settings, as this is a critical time when interest in science can set the direction of future career goals (Maltese & Tai, 2011).
Even if talks did go beyond polite requests to pass the salt, full-scale negotiation is a long way off.Yet the Saudi initiative to bring the sides together comes at an opportune time, when interests may start slowly to converge towards a negotiated solution.
An additional source of foreign exchange were short-term capital inflows motivated by the high real interest rates, at a time when US interest rates were relatively low.
It has drawn crowds at a time when public interest in the arts and sciences is often lackluster.
