phrases – Unable to import term_meta in wordpress utilizing wp_cron

I’ve imported cities as time period named as sf-cities I am attempting so as to add international locations title as time period meta I’ve connected pattern of my code.

add_action( 'event_notification', 'import_countries', 10, 0 );
perform import_countries(){
    $response = wp_remote_get('https://uncooked.githubusercontent.com/russ666/all-countries-and-cities-json/grasp/international locations.json');
    $response_body = wp_remote_retrieve_body( $response );
    $international locations = json_decode($response_body);
    
    $last_id = 0;
    
    $phrases = get_terms( array(
        'taxonomy' => 'sf-cities',
         'hide_empty' => false,
    )); 
    $depend = 1;
    foreach($international locations as $nation => $cities) {
        foreach($cities as $metropolis) {
            $time period = get_term_by('title', $metropolis, 'sf-cities');
            if( $depend == 1000 ) {
                $depend = 1;
                usleep(500);
            }
            if(!empty( $time period )) {
                if( $term->term_id > 220 ) { 
                    if( empty( get_term_meta( $term->term_id , 'nation', true) )) {
                        add_term_meta( $term->term_id ,'nation', $nation );       
                    } else {
                        update_term_meta( $term->term_id ,'nation', $nation );        
                    }
                    
                } 
                $last_id = $term->term_id;
            } else {
                proceed;
            }
            $depend++;
        }
    }
    return $last_id;
}

Even it was working within the json file there are 80k information in there. Is there another chance so as to add time period meta worth with out cron job.