And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. Acts 2:2 (KJV) emphasis mine

One hundred twenty people were waiting on God for the promise of the Spirit, and suddenly, God moved and fulfilled the promise. As we wait and expect to see God move, we will see just that. No matter how long or how hard it has been, God has a “suddenly” for you; a sudden breakthrough. As we wait and trust God, He will move, He will fulfill His promise, and we will receive from Him what we waited and looked for. Suddenly your health will change for the better; a total manifestation of healing. Suddenly your finances will improve. Suddenly your loved one will be saved. Suddenly, God will move by His Spirit and fulfill His promises to you.

 And at midnight Paul and Silas prayed, and sang praises unto God: and the prisoners heard them. And suddenly there was a great earthquake, so that the foundations of the prison were shaken: and immediately all the doors were opened, and every one's bands were loosed. Acts 16:25-26 (KJV) emphasis mine

Suddenly God moved and immediately the doors were opened and everyone’s bands were loosed. God will shake things up and open doors when they need to be opened. It may seem like its been a long time coming, but suddenly and immediately, at the right time, God will move and needs will be met.