'constant migration' is correct and usable in written English.
You can use this phrase to describe a situation in which people are consistently moving from one place to another. For example, "The town has experienced constant migration over the last twenty years, as more people move away for better job opportunities."
The Jere-Ngoni were not, however, in a state of constant migration.
California is a big state, with a diverse population and constant migration, so there's a lot to find.
The impact of such large herds on the plant life of the time must have been great, suggesting constant migration in search of food.
Conrad's genius lies in his constant migration to the outside edge, to a place on the periphery from where value is generated inwardly, by a constantly recessive unveiling or unwrapping.
But this particular outpost (there are Gems in Midtown and SoHo also) is in the heart of Chelsea and, despite the constant migration northward of New York's gay epicenter to Clinton (also known as Hell's Kitchen), Chelsea ain't over.
(3) Since these stories have been accumulated through centuries of constant migration, they provide an unrivalled body of "clinical" material for studying the processes by which popular tales in fact travel and are transformed.
By "taking a stone on a walk", as he has done around the Ring of Kerry, he is alluding to the constant migrations of matter caused by the earth's movement, be it slow-motion geological time or the flux of seasons, storms and tides.
Overall however, slaves accounted for just a small part of the Cuban population which was mainly European, due to constant migrations from Spain, especially from the Canary Islands.
Various dynamic parameters such as lattice constants, conductivity, hopping energy, dielectric constants, migration energies, association energy are obtained in the intermediate temperature range and compared.
Naïvely assuming constant net migration levels as from 2000 would result in a total net migration for the period 2000-050 for the EEA+ of well over 57 million people.
An often ignored force of change in New York is the constant internal migration it attracts.
