ところを
tokorō

Particle

1. although (it is a certain time or something is in a certain condition); even though normally

いそがしいところをご来社 らいしゃいただきありがとうございました。
oisogashii tokorō goraisha itadakiarigatō gozaimashita.
Thank you for taking the time out to pay a visit to our company.
Other forms: