を契機に => as a good opportunity/chance to N2
Expected
を[機「き」]に => Use A as an opportunity N1
Time, Situation
を[契機「けいき」] => As a good opportunity A, (do) B N2
Information, Report
うちに => While... N3
どちら => Where N5
Doubt
たちまち  => Immediately, Quickly, Suddenly, In a moment or flash N2
Status
ここ/そこ/あそこ/こちら/そちら/あちら => here / there / over there N5
Spatial relations
うちに => While; Before ~ N2
のうちに => Within... N3
Limit
ちょっと => a little N4
More or less in quantity
をきっかけに/を契機に => with… as a start; as a result of; taking advantage of N2
たち => Plural form N5
Amount